I'm not sure what the original source of the problem is, but I am finding that the 'missing files' are almost all exactly where they are supposed to be, and if I manually guide the library loader to them, it solves that particular problem. I downloaded the program installer twice and had the same problem both times, so I think that if something is corrupt, it's in the program, not a transmission error. If anyone else has installed 11.2.289 on a windows 10 machine, I'd be interested to know if you can duplicate the problem on Paul, Pauline, or Roxy.